<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <!-- 添加分类按钮区 -->
      <el-row>
        <el-col>
          <el-button
            type="primary"
            icon="el-icon-user"
            @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>

      <!-- 表格区 -->
      <tree-table
        :data="cateList"
        :columns="columns"
        :expand-type="false"
        :selection-type="false"
        :show-index="true"
        index-text="##"
        border
        :show-row-hover="false"
        class="treeTable"
      >
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
            size="medium"
          ></i>
          <i class="el-icon-error" size="medium" style="color: red" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" type="" v-if="scope.row.cat_level === 0"
            >一级</el-tag
          >
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt" slot-scope="scope" >
          <el-button
            type="success"
            icon="el-icon-edit"
            size="small"
            @click="editCateDialog(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button
            type="warning"
            icon="el-icon-delete"
            size="small"
            @click="delCate(scope.row.cat_id)"
            >删除</el-button
          >
          <el-button
            type="primary"
            icon="el-icon-bell"
            size="mini"
            @click="changeCate(scope.row.cat_id)"
            >有效变更</el-button
          >
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
    <!-- 添加分类的对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="40%"
      @close="addCateDialogClosed"
    >
      <!-- 添加分类的表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <!-- option用来指定数据源 -->
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            @change="parentCateChanged"
            :props="cascaderProps"
            clearable
          >
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑分类的对话框 -->
    <el-dialog
      title="编辑分类"
      :visible.sync="editCateDialogVisible"
      width="30%"
    >
      <el-form
        :model="editCateForm"
        :rules="addCateFormRules"
        ref="editCateFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editCateForm.cat_name" ></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 删除分类的对话框 -->

  </div>
</template>

<script>
export default {
 
  data() {
    var checkInput=(rule,value,cb)=>{
        const index=value.indexOf(' ')
        if(index!==-1){return cb(new Error('不允许有空格！'))}
        else{
          return cb()
        }
  
      }
    return {
      //商品查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      //商品分类的数据列表
      cateList: [],
      //总数据条数
      total: 0,
      //为table指定列的定义
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          //表示将当前列定义为模板列
          type: "template",
          //表示当前这一列使用模板名称
          template: "isok",
        },
        {
          label: "排序",
          //表示当前列定义为模板列
          type: "template",
          //表示当前这一列使用模板的名称
          template: "order",
        },
        {
          label: "操作",
          //表示当前列定义为模板列
          type: "template",
          //表示当前这一列使用模板的名称
          template: "opt",
        },
      ],
      //控制添加分类对话框的显示与隐藏
      addCateDialogVisible: false,
      //添加分类表单的数据对象
      addCateForm: {
        //将要添加分类的对象名称
        cat_name: "",
        //父级分类id
        cat_pid: 0,
        //分类的等级
        cat_level: 0,
      },
      //添加分类表单的验证规则对象
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
          { min: 2, max: 8, message: "长度在 2 到 8 个字符", trigger: "blur" },
          {validator:checkInput,trigger:'blur'}
        ],
      },

      //
      parentCateList: [],
      //指定级联选择器的配置对象
      cascaderProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children",
        checkStrictly: true,
      },
      //选中的父级分类的Id数组
      selectedKeys: [],
      //选中的值
      selectedOption: "",
      //编辑对话框
      editCateDialogVisible: false,
      //删除对话框
      delCateDialogVisible: false,
      //编辑的数据
      editCateForm: {},
    };
  },
  created() {
    this.getCateList();
    // console.log(this.test666)
  },
  methods: {
    //获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo,
      });
      if (res.meta.status !== 200)
        return this.$message.success("获取商品分类失败");
      //把数据列表，赋值给cateList
      this.cateList = res.data.result;
      //为数据总条数负责
      this.total = res.data.total;
    },
    //监听pagesize改变的事件
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    //监听页码的改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCateList();
    },
    //控制添加分类对话框的显示与隐藏
    showAddCateDialog() {
      //先获取父级分类的列表，再展示对话框
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    //获取父级分类的数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 },
      });
      if (res.meta.status !== 200)
        return this.$message.error("获取父级数据列表失败");
      this.parentCateList = res.data;
    },
    //选择项发生变化时触发
    parentCateChanged() {
      //如果selectedKey数组中的length大于0，则选中了
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid =
          this.selectedKeys[this.selectedKeys.length - 1];

        this.addCateForm.cat_level = this.selectedKeys.length;
        return;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    //点击按钮添加新分类
    async addCate() {
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateForm
        );
        if (res.meta.status !== 201) return this.$message.error("添加分类失败");
        this.getCateList();
        this.$message.success("添加分类成功");
        this.addCateDialogVisible = false;
      });
    },
    //监听对话框的关闭事件，重置表单数据
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_pid = 0;
      this.addCateForm.cat_level = 0;
    },
    //控制编辑对话框的显示与隐藏
    async editCateDialog(id) {
      const { data: res } = await this.$http.get(`categories/${id}`);
      if (res.meta.status !== 200)
        return this.$message.error("获取当前列信息失败");
      this.editCateForm = res.data;
      this.editCateDialogVisible = true;
    },
    //编辑数据
    async editCate() {
      const { data: res } = await this.$http.put(
        `categories/${this.editCateForm.cat_id}`,
        {cat_name:this.editCateForm.cat_name}
      );
      if (res.meta.status !== 200) return this.$message.error("数据更新失败");
      
      this.getCateList();
      this.$message.success('数据更新成功')
      this.editCateDialogVisible = false;
    },

    //删除分类
    delCate(id) {
      this.$confirm(
        '此操作将永久删除该分类, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'}
      ).then(async () => {
          const { data: res } = await this.$http.delete(`categories/${id}`);
          if(res.meta.status!==200)return this.$message.error('删除出错！')
          this.$message({
            type: "success",
            message: "删除成功！",
          });
          
          // this.cateList[0].children[0].cat_deleted=false
          this.getCateList()
        }).catch(() => {
          this.$message({
            type: "info",
            message: "已经取消删除",
          });
        });
        
    },

    findData(id){
        this.cateList.forEach(item => {
            this.editData(item,id)
        });         
    },
    editData(cate,id){
        if(cate.cat_id===id){
            cate.cat_deleted=!cate.cat_deleted
            return
          }
        if(!cate.children){
          return  
        }
        cate.children.forEach(item=>{
          this.editData(item,id)
        })
    },
    changeCate(id){
      this.findData(id)
    }
  },
};
</script>

<style scoped lang="less">
.treeTable {
  margin-top: 15px;
}
</style>